<?php

/**
 * Directive
 *
 * @package Less
 * @subpackage tree
 */
class Less_Tree_Directive extends Less_Tree{

	public $name;
	public $value;
	public $rules;
	public $index;
	public $isReferenced;
	public $currentFileInfo;
	public $debugInfo;
	public $type = 'Directive';

	public function __construct($name, $value = null, $rules, $index = null, $currentFileInfo = null, $debugInfo = null ){
		$this->name = $name;
		$this->value = $value;
		if( $rules ){
			$this->rules = $rules;
			$this->rules->allowImports = true;
		}

		$this->index = $index;
		$this->currentFileInfo = $currentFileInfo;
		$this->debugInfo = $debugInfo;
	}


    public function accept( $visitor ){
		if( $this->rules ){
			$this->rules = $visitor->visitObj( $this->rules );
		}
		if( $this->value ){
			$this->value = $visitor->visitObj( $this->value );
		}
	}


    /**
     * @see Less_Tree::genCSS
     */
    public function genCSS( $output ){
		$value = $this->value;
		$rules = $this->rules;
		$output->add( $this->name, $this->currentFileInfo, $this->index );
		if( $this->value ){
			$output->add(' ');
			$this->value->genCSS($output);
		}
		if( $this->rules ){
			Less_Tree::outputRuleset( $output, array($this->rules));
		} else {
			$output->add(';');
		}
	}

	public function compile($env){

		$value = $this->value;
		$rules = $this->rules;
		if( $value ){
			$value = $value->compile($env);
		}

		if( $rules ){
			$rules = $rules->compile($env);
			$rules->root = true;
		}

		return new Less_Tree_Directive( $this->name, $value, $rules, $this->index, $this->currentFileInfo, $this->debugInfo );
	}


	public function variable($name){
		if( $this->rules ){
			return $this->rules->variable($name);
		}
	}

	public function find($selector){
		if( $this->rules ){
			return $this->rules->find($selector, $this);
		}
	}

	public function markReferenced(){
		$this->isReferenced = true;
		if( $this->rules ){
			Less_Tree::ReferencedArray($this->rules->rules);
		}
	}

}
